org.apache.jackrabbit.core.state

Class ItemStateReferenceCache

    • Constructor Detail

      • ItemStateReferenceCache

        public ItemStateReferenceCache(ItemStateCacheFactory cacheFactory)
        Creates a new ItemStateReferenceCache that uses a MLRUItemStateCache instance as internal cache.
      • ItemStateReferenceCache

        public ItemStateReferenceCache(ItemStateCache cache)
        Creates a new ItemStateReferenceCache that uses the specified ItemStateCache instance as internal secondary cache.
        Parameters:
        cache - secondary cache implementing a custom eviction policy
    • Method Detail

      • isCached

        public boolean isCached(ItemId id)
        Returns true if this cache contains an ItemState object with the specified id.
        Specified by:
        isCached in interface ItemStateCache
        Parameters:
        id - id of ItemState object whose presence should be tested.
        Returns:
        true if there's a corresponding cache entry, otherwise false.
      • retrieve

        public ItemState retrieve(ItemId id)
        Returns the ItemState object with the specified id if it is present or null if no entry exists with that id.
        Specified by:
        retrieve in interface ItemStateCache
        Parameters:
        id - the id of the ItemState object to be returned.
        Returns:
        the ItemState object with the specified id or or null if no entry exists with that id
      • retrieveAll

        public ItemState[] retrieveAll()
        Returns all the cached item states.
        Specified by:
        retrieveAll in interface ItemStateCache
        Returns:
        newly allocated item state array
      • cache

        public void cache(ItemState state)
        Stores the specified ItemState object in the map using its ItemId as the key.
        Specified by:
        cache in interface ItemStateCache
        Parameters:
        state - the ItemState object to cache
      • evict

        public void evict(ItemId id)
        Removes the ItemState object with the specified id from this cache if it is present.
        Specified by:
        evict in interface ItemStateCache
        Parameters:
        id - the id of the ItemState object which should be removed from this cache.
      • dispose

        public void dispose()
        Informs the cache that it is no longer in use.
        Specified by:
        dispose in interface ItemStateCache
      • evictAll

        public void evictAll()
        Clears all entries from this cache.
        Specified by:
        evictAll in interface ItemStateCache
      • isEmpty

        public boolean isEmpty()
        Returns true if this cache contains no entries.
        Specified by:
        isEmpty in interface ItemStateCache
        Returns:
        true if this cache contains no entries.

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